US7767921B2 - Circuit breaker for electrical power leads of motor vehicles - Google Patents

Circuit breaker for electrical power leads of motor vehicles Download PDF

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Publication number
US7767921B2
US7767921B2 US11/910,496 US91049606A US7767921B2 US 7767921 B2 US7767921 B2 US 7767921B2 US 91049606 A US91049606 A US 91049606A US 7767921 B2 US7767921 B2 US 7767921B2
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US
United States
Prior art keywords
connection element
circuit breaker
projection
recess
flat part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US11/910,496
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English (en)
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US20080197001A1 (en
Inventor
Martin Schloms
Franz-Josef Lietz
Uwe Glasenapp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Auto Kabel Management GmbH
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Auto Kabel Management GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Auto Kabel Management GmbH filed Critical Auto Kabel Management GmbH
Assigned to AUTO KABEL MANAGEMENTGESELLSCHAFT MBH reassignment AUTO KABEL MANAGEMENTGESELLSCHAFT MBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GLASENAPP, UWE, LIETZ, FRANZ-JOSEF, SCHLOMS, MARTIN DIPL.-ING.
Publication of US20080197001A1 publication Critical patent/US20080197001A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/08—Fusible members characterised by the shape or form of the fusible member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/20—Pins, blades, or sockets shaped, or provided with separate member, to retain co-operating parts together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
    • H01R13/633—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only
    • H01R13/637—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances for disengagement only by fluid pressure, e.g. explosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H01H2039/008—Switching devices actuated by an explosion produced within the device and initiated by an electric current using the switch for a battery cutoff
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49105—Switch making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49107—Fuse making

Definitions

  • the application in general relates to a circuit breaker for electrical power leads, especially energy supply lines or battery cables of motor vehicles, with a first connection element and a second connection element, in which when the circuit breaker is in conducting state a current path runs between the first connection element and the second connection element.
  • DE 197 12 544 A1 discloses a circuit breaker and circuit breaker wiring.
  • DE 197 12 544 A1 suggests cutting off the supply of power by mechanical cutting of a fuse.
  • the result of this cutting of the fuse is that after a serious collision the circuit breaker is destroyed and has to be replaced.
  • the piston can be prevented from jumping back into the original position by an annular shoulder in the hollow cylinder.
  • This very precise circuit breaker arrangement has the disadvantage that it is expensive to manufacture. Therefore it is only worthwhile for use in high-priced vehicles.
  • EP 1 469 564 A1 discloses a pyrotechnical battery pole separation element.
  • a separation element a one-piece conductor arrangement is separated at a separation point by means of a separation element arranged on a separation piston if there is an accident.
  • the separating piston is driven by a pyrotechnical drive.
  • the invention was based on the problem of providing a circuit breaker for electrical power leads which is, firstly, economical to manufacture, and secondly, guarantees faultless operation.
  • connection element has a recess
  • second connection element is formed from an electrically-conductive flat part and that the second connection element has a projection corresponding with the recess, in such a way that when the circuit breaker is in conducting state the projection is held in the recess by force closure.
  • connection element Since at least the second connection element is made from flat parts, manufacture is extremely cheap. But the first connection element may also be made from a flat conductor, which further reduces production costs.
  • the flat parts can easily be shaped and thus both a recess and a projection can be formed in the connection elements with little technical effort.
  • the two connection elements can be mechanically connected to each other by means of the force closure (friction locking) connection between projection and recess. This produces a current path.
  • the force which must be applied to break this connection can be adjusted by the design of the recess and of the projection.
  • the projection is arranged in the recess by means of a press fit.
  • a direct clamp connection between projection and recess is preferable.
  • a conical press fit is especially preferred.
  • the recess and/or the projection can be tapered in shape. It is preferable if the pot tapers starting from the flat part.
  • connection elements can be made especially economically if at least one flat part is made from sheet metal. Sheets of electrically-conductive materials of various thicknesses are cheap and are easy to work. Extruded strips can also be used to produce the flat parts.
  • the flat parts prefferably be formed out of the sheet metal using separation methods.
  • suitable separation methods are stamping, laser cutting, sawing or other non-cutting or cutting separation methods.
  • the recess can be stamped, cut or drilled out of the connection element.
  • the recess has a collar.
  • This collar can for example be created when the recess is stamped out of the connection element.
  • the collar can also be made by inserting a mandrel into the recess, after this has been formed.
  • the collar can be formed so that a good fit is created between projection and recess.
  • the circuit breaker can be manufactured especially economically if the projection is formed in one piece from the flat part.
  • the projection can be drawn out of the flat part. This can be done for example by means of stretch-forming or deep-drawing or by means of bending.
  • a stamp can be guided into the flat part in such a way that the flat part forms the projection. It is, however, also possible for the projection to be attached to the flat part using bonding and/or force closing (frictional joining).
  • the projection is a deep-drawn pot corresponding with the recess. It is especially preferable to manufacture the circuit breaker very cheaply and quickly when the projection is not drawn out of the flat part until the joining of the first connection element with the second connection element. Then for example the first connection element can be laid on the second connection element, and a stamp can simultaneously form the projection and drive into the recess in order to join the connection elements together.
  • a further advantageous embodiment is produced when a separation unit is provided on the first connection element.
  • the separation unit can have an accessory drive by means of which the connection elements can be separated from each other.
  • a pyrotechnic igniter is preferred as accessory drive.
  • This separation unit can be provided on the first connection element in such a way that it can separate the frictional connection between the first connection element and the second connection element. For example, by firing the igniter, a pressure can be generated which presses the projection out of the recess and thus effects a separation of the connection elements.
  • a further aspect of the application is a method for manufacturing a circuit breaker for motor vehicles by forming a first connection element and forming a second connection element made from an electrically conducting flat part, characterised by the forming of a recess in the first connection element, the forming of a projection corresponding with the recess in the second connection element, and connecting the first connection element with the second connection element by force closure (frictional connection) of projection and recess.
  • the circuit breaker can be manufactured especially advantageously and cheaply if the projection is not formed until the connection elements are joined together. This can occur for example by the fact that a mandrel drives the material of the second connection element into the recess of the first connection element and thus forms a projection in the second connection element, which is in a press connection with the first connection element.
  • FIG. 1A a first connection element
  • FIG. 1B a second connection element
  • FIG. 1C a circuit breaker with joined connection elements
  • FIG. 2 a first embodiment of a joining of the connection elements
  • FIG. 3 a second embodiment of a joining of the connection elements
  • FIG. 4 a view of a circuit breaker with pyrotechnic separation unit
  • FIG. 5A a circuit breaker in conducting state before activation of the pyrotechnic separation unit
  • FIG. 5B a circuit breaker in separated state after activation of the pyrotechnic ignition unit
  • FIG. 6 a sectional view of a closed circuit breaker
  • FIG. 7 a lateral view of an open circuit breaker.
  • FIG. 1A shows a first connection element 2 with a recess 8 .
  • the first connection element 2 can be a flat part made from sheet metal. To manufacture the flat part, this can be stamped, cut or otherwise produced from a sheet of metal.
  • the recess 8 can be stamped out of the flat part. It is also possible to cut or drill the recess out of the flat part.
  • FIG. 1B shows a second connection element 4 .
  • This second connection element 4 can, like the first connection element 2 , be a flat part formed out of a sheet of metal.
  • a projection 10 is provided on the second connection element 4 .
  • the projection 10 can be made in the form of a pot.
  • the projection 10 is in particular formed in one piece with the flat part. To manufacture the projection 10 , this can be deep-drawn out of the flat part.
  • the projection 10 can also be welded or soldered onto the flat part.
  • connection elements 2 , 4 can have a constriction 5 .
  • the constriction 5 can serve as a predetermined break point. When the connection is blasted off, one connection element can be more easily deformed along the constriction 5 , with the result that the projection 10 is more easily released from the recess 8 .
  • the second flat part 4 can be laid on the first connection element 2 in the raw state and a mandrel (not shown) can press the flat part into the recess 8 , so that the projection 10 is formed and at the same time the connection elements 2 , 4 can be frictionally connected.
  • FIG. 1C shows a circuit breaker 6 in which the first connection element 2 is joined to the second connection element 4 .
  • a direct clamp connection is provided. This can for example be a frictional press connection.
  • a current path is formed between connection element 2 and connection element 4 .
  • connection element 2 and connection element 4 via the projection 10 may take various forms. If recess 8 and projection 10 are conical, a conical press fit can be produced.
  • FIG. 2 shows a first connection of the connection elements 2 , 4 in which a collar 12 runs along the recess 8 of the first connection element 2 .
  • the seat-engaging surface of the projection 10 in the recess 8 is enlarged by the collar 12 , guaranteeing a better frictional connection.
  • the collar 12 can be made as follows: after the recess 8 has been formed, a mandrel engages in this and presses further material of the flat part out of the recess.
  • FIG. 3 shows one possible embodiment of the connection element 2 in which the recess 8 has no collar 12 .
  • Such a connection element 2 can be manufactured cheaply, but has a weaker force closure, since the projection 10 has a smaller seat-engaging surface on connection element 2 .
  • FIG. 4 shows a circuit breaker 6 in assembled condition.
  • the connection elements 2 , 4 are joined together by means of a press connection.
  • a pyrotechnic ignition unit 14 is arranged on the connection element 2 .
  • This pyrotechnic separation unit 14 can be sheathed by means of extrusion coating 18 . In the embodiment shown, the extrusion coating 18 is cut open in order to display the pyrotechnic separation unit 14 better.
  • an electrical connection to a plug socket 16 can be arranged.
  • a pressure can be built up in the cylinder space between igniter and projection which breaks the connection between the connection elements 2 , 4 .
  • the separation unit 14 can be sealed using an O-ring 15 . The effect of the seal is that there is no drop in gas pressure in the cylinder before the pot has been blasted out of the recess.
  • Connections 20 a , 20 b can be formed on the connection elements 2 , 4 for attachment to a safety battery terminal.
  • the connections 20 can be made in one piece with the connection elements 2 , 4 .
  • Supporting structures may also be arranged on the connections 20 near the boreholes 20 .
  • the connections 20 allow attachment to battery pole terminals. This can secure the current path between a battery pole terminal and the vehicle system.
  • FIG. 5A shows a circuit breaker 6 before activation of the pyrotechnic separation unit 14 .
  • the connection elements 2 , 4 are electrically connected to each other.
  • the pyrotechnic separation unit 14 is provided in the extrusion coating 18 .
  • a current flow can run from connection 20 a via connection element 4 , connection element 2 and connection 20 b.
  • the pyrotechnic separation unit 14 can be driven and the igniter ignited.
  • the gas pressure created by the ignition of the igniter has the effect of pressing the projection 10 out of the recess 8 and separating the current path between connection element 2 and connection element 4 .
  • the constriction 5 thereby serves the purpose of simplifying the separation of the connection elements 2 , 4 .
  • the connection element 2 , 4 can be more easily bent along the constriction 5 . Therefore a lesser force acts on the connection 20 at the time of ignition.
  • FIG. 6 shows a sectional view of a circuit breaker according to one embodiment.
  • the circuit breaker also has a safety housing 22 . After ignition of the igniter 14 , part of the connection element 4 is pivoted into this safety housing 22 . The safety housing prevents the connection element 4 getting into the engine space.
  • a housing 24 seals off the igniter 14 .
  • a joining flange 24 a can grip tightly around the collar 8 for this purpose.
  • a seal 28 can be provided, preventing the gas escaping from the cylinder space following ignition of the igniter 14 .
  • the joining flange 24 a of the housing 24 is pushed onto the collar 8 during assembly.
  • the igniter 14 can be inserted into the housing 24 beforehand.
  • the pot 10 can have a recess 26 in the direction of the cylinder space. A higher gas pressure can build up in this recess 26 , which promotes the separation of the connection.
  • FIG. 7 shows the circuit breaker according to FIG. 6 in open condition. Only the housing 24 is shown in a non-cut condition.
  • the inventive circuit breaker is characterised by economical and simple manufacture. Also, following activation of the pyrotechnic separation unit, the circuit breaker can be reassembled, so that there is no longer any need to replace components.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuses (AREA)
  • Air Bags (AREA)
  • Control Of Electric Motors In General (AREA)
  • Protection Of Generators And Motors (AREA)
  • Control Of Direct Current Motors (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Insulated Conductors (AREA)
  • Organic Insulating Materials (AREA)
  • Conductive Materials (AREA)
US11/910,496 2005-04-08 2006-03-22 Circuit breaker for electrical power leads of motor vehicles Active 2026-09-23 US7767921B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP05007772A EP1710871B1 (de) 2005-04-08 2005-04-08 Stromunterbrecher für elektrische Versorgungsleitungen von Kraftfahrzeugen
EP05007772 2005-04-08
EP05007772.6 2005-04-08
PCT/EP2006/060943 WO2006106042A1 (de) 2005-04-08 2006-03-22 Stromunterbrecher für elektrische versorgungsleitungen von kraftfahrzeugen

Publications (2)

Publication Number Publication Date
US20080197001A1 US20080197001A1 (en) 2008-08-21
US7767921B2 true US7767921B2 (en) 2010-08-03

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ID=35432709

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/910,496 Active 2026-09-23 US7767921B2 (en) 2005-04-08 2006-03-22 Circuit breaker for electrical power leads of motor vehicles
US11/910,588 Expired - Fee Related US8154377B2 (en) 2005-04-08 2006-04-07 Passive triggering of a circuit breaker for electrical supply lines of motor vehicles

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11/910,588 Expired - Fee Related US8154377B2 (en) 2005-04-08 2006-04-07 Passive triggering of a circuit breaker for electrical supply lines of motor vehicles

Country Status (9)

Country Link
US (2) US7767921B2 (es)
EP (2) EP1710871B1 (es)
CN (2) CN100592577C (es)
AT (2) ATE372598T1 (es)
DE (3) DE502005001423D1 (es)
ES (2) ES2290809T3 (es)
PL (2) PL1710871T3 (es)
PT (1) PT1866945E (es)
WO (2) WO2006106042A1 (es)

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US20140001015A1 (en) * 2011-03-21 2014-01-02 Cooper Medc Limited Locking switch assembly and manufacture of locking component
US10529516B2 (en) 2015-01-27 2020-01-07 Leoni Bordnetz-Systeme Gmbh Pyrotechnic safety element
US11335522B2 (en) * 2020-04-23 2022-05-17 Raytheon Company High power, single-use electrical switch

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DE102008055904B4 (de) 2008-11-05 2018-03-22 Auto-Kabel Management Gmbh Steckverbindung für ein Insassenschutzmittel
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DE102009033410B4 (de) * 2009-07-15 2011-09-01 Auto-Kabel Managementgesellschaft Mbh Stromkreisunterbrecher für elektrische Versorgungsleitungen von Kraftfahrzeugen
DE102010011150B4 (de) 2010-03-11 2012-03-29 Auto-Kabel Managementgesellschaft Mbh Elektrische Sicherung für Kraftfahrzeugenergieleitungen und Herstellungsverfahren für eine solche Sicherung
DE102010015240B4 (de) 2010-04-15 2012-02-16 Auto-Kabel Managementgesellschaft Mbh Trennvorrichtung für Kraftfahrzeugenergieleiter und deren Verwendung
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JP5355796B2 (ja) * 2010-09-30 2013-11-27 本田技研工業株式会社 スクータ型電動車両
US8362380B2 (en) 2011-01-31 2013-01-29 Bren-Tronics Batteries International, L.L.C. Current isolation contactor
FR3017240B1 (fr) * 2014-02-04 2016-01-29 Ncs Pyrotechnie Et Tech Sas Coupe-circuit pyrotechnique
DE102014111772B4 (de) * 2014-08-18 2016-03-24 Borgwarner Ludwigsburg Gmbh Sicherung für einen elektrischen Stromkreis sowie Leiterplatte mit einer Sicherung
EP2996133B8 (en) * 2014-09-09 2017-08-23 ArianeGroup SAS Pyrotechnic circuit breaker having an improved structure for accommodating a bus bar, and assembly method thereof
EP2996134B1 (en) * 2014-09-09 2017-04-26 Airbus Safran Launchers SAS Pyrotechnic circuit breaker with improved cutting of the bus bar
DE102017108404B4 (de) * 2017-04-20 2020-06-18 Webasto SE Elektrische Heizeinrichtung
DE102017118416A1 (de) 2017-08-11 2019-02-14 Ruag Ammotec Gmbh Pyrotechnische Trenneinrichtung, System zum elektrischen Laden einer elektrischen Energiezelle, Mobilgerät und Ladegerät
DE102017011471B3 (de) 2017-12-13 2019-01-24 Audi Ag Elektrische Sicherung mit einem pyrotechnischen Trennelement
DE102018204105A1 (de) * 2018-03-16 2019-09-19 Leoni Bordnetz-Systeme Gmbh Sicherungsvorrichtung sowie Set von mehreren Typen von Sicherungsvorrichtungen
DE102019126192B3 (de) 2019-09-27 2021-02-25 Ruag Ammotec Gmbh Verfahren und System zum Bereitstellen einer vorbestimmten pyrotechnischen Energieabgabe

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US20080197001A1 (en) 2008-08-21
CN100592577C (zh) 2010-02-24
DE502005001423D1 (de) 2007-10-18
US8154377B2 (en) 2012-04-10
EP1710871A1 (de) 2006-10-11
WO2006077268A1 (de) 2006-07-27
ES2290809T3 (es) 2008-02-16
PT1866945E (pt) 2008-11-12
EP1866945B1 (de) 2008-08-13
WO2006106042A1 (de) 2006-10-12
CN101283427B (zh) 2012-05-23
EP1710871B1 (de) 2007-09-05
ATE404986T1 (de) 2008-08-15
ATE372598T1 (de) 2007-09-15
CN101151772A (zh) 2008-03-26
DE502006001340D1 (de) 2008-09-25
ES2312129T3 (es) 2009-02-16
PL1866945T3 (pl) 2009-01-30
EP1866945A1 (de) 2007-12-19
US20080204184A1 (en) 2008-08-28
DE202006020172U1 (de) 2008-04-17
CN101283427A (zh) 2008-10-08

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